20981331

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{9001}}^1$

素因数の和:9051

約数の個数: 24

約数和(自身を含む): 35575904

約数和(自身を除く): 14594573

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 9001, 27003, 63007, 81009, 189021, 333037, 567063, 999111, 2331259, 2997333, 6993777, 20981331]

約数ペア:

[(1, 20981331), (3, 6993777), (7, 2997333), (9, 2331259), (21, 999111), (37, 567063), (63, 333037), (111, 189021), (259, 81009), (333, 63007), (777, 27003), (2331, 9001)]